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Tethys Instruments
 

Nitrogen oxides (NOx) analyzer
EXM400 Tethys Instruments

  • nitrogen oxides (NOx) analyzer EXM400 Tethys Instruments
The measurement principle is based on the UV absorption spectrum of gases in the UV range.
The periodic structure of the absorption bands coming from the different levels of rotational energy of the gas molecules is analysed by performing a Fourier Transform on the absorption spectrum with a high speed DSP (Digital Signal Processor).

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